.ws_ques_learnmode {
    display: flex;
    position: relative;
    width: 100px;
    height: 25px;
    margin: 10px auto;
    border-radius: 5px;
    box-shadow: 1px 1px 1px rgba(255, 255, 255, 0.3), -1px -1px 1px rgba(255, 255, 255, 0.3),
    1px -1px 1px rgba(255, 255, 255, 0.3), -1px 1px 1px rgba(255, 255, 255, 0.3); 
}
/*选中的按钮背景*/
.ws_ques_learnmode::before {
    content: '';
    display: block;
    position: absolute;
    width: calc(50% - 2px);
    height: calc(100% - 2px);
    z-index: 0;
    background-color: rgba(255, 255, 255, 0.8);
    top: 1px;
    left: calc(50% + 1px);
    border-radius: 0px 5px 5px 0px;
    transition: left 0.3s;
}
#vapp[view='night'] .ws_ques_learnmode::before {
    background-color: rgba(255, 255, 255, 0.8) !important;
}
.ws_ques_learnmode[even]::before {
    left: 1px;
    border-radius: 5px 0px 0px 5px;
}

.ws_ques_learnmode>div {
    flex: 1;
    line-height: 21px;
    box-sizing: border-box;
    padding: 2px 8px;
    font-size: 14px;
    color: #999;
    z-index: 1;
    text-align: center;
}

.ws_ques_learnmode>div[current] {
    color: #333;
}